Deuteronomy 2:30

²³Sihon would not allow Israel to pass through his border, but Sihon gathered all his people together, and went out against Israel into the wilderness, and came to Jahaz. He fought against Israel.

²¹The LORD said to Moses, “When you go back into Egypt, see that you do before Pharaoh all the wonders which I have put in your hand, but I will harden his heart and he will not let the people go.

¹⁰Moses and Aaron did all these wonders before Pharaoh, but the LORD hardened Pharaoh’s heart, and he didn’t let the children of Israel go out of his land.

¹⁹There was not a city that made peace with the children of Israel, except the Hivites, the inhabitants of Gibeon. They took all in battle. ²⁰For it was of the LORD to harden their hearts, to come against Israel in battle, that he might utterly destroy them, that they might have no favor, but that he might destroy them, as the LORD commanded Moses.

²⁰But Sihon didn’t trust Israel to pass through his border; but Sihon gathered all his people together, and encamped in Jahaz, and fought against Israel.

¹⁷For the Scripture says to Pharaoh, “For this very purpose I caused you to be raised up, that I might show in you my power, and that my name might be proclaimed in all the earth.”¹⁸So then, he has mercy on whom he desires, and he hardens whom he desires.

¹⁹You will say then to me, “Why does he still find fault? For who withstands his will?” ²⁰But indeed, O man, who are you to reply against God? Will the thing formed ask him who formed it, “Why did you make me like this?”²¹Or hasn’t the potter a right over the clay, from the same lump to make one part a vessel for honor, and another for dishonor? ²²What if God, willing to show his wrath and to make his power known, endured with much patience vessels of wrath prepared for destruction, ²³and that he might make known the riches of his glory on vessels of mercy, which he prepared beforehand for glory—

⁴Because I knew that you are obstinate, and your neck is an iron sinew, and your brow bronze;